Traditional 4 Mallet Grip Example by Andrei Pushkarev
Here are a couple videos from vibraphonist, Andrei Pushkarev. He uses the traditional 4-mallet grip
, where the inner mallets are on top, versus the Burton grip where the outside mallets are on top.
http://www.youtube.com/watch?v=pNWTXDD53EE
http://www.youtube.com/watch?v=PGy2cZAl46M